delete command on mongos can return a negative count of deleted documents

Create a collection named "test" with 2,147,483,648 documents. That's one more than the largest possible positive number that can be represented with a 32 bit signed integer. Run the following command: db.runCommand({ delete : "test", deletes : [ { q : {}, limit : 0 } ] }) The expected result is: { "ok" : 1, "n" : 2147483648 } The actual result is: { "ok" : 1, "n" : -2147483648 }